ACCOUNTS PAYABLE, ACCRUED AND OTHER LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
ACCOUNTS PAYABLE, ACCRUED AND OTHER LIABILITIES.
Accounts payable, principally trade	$ 192,739		$ 164,528
Accrued employee compensation costs	163,839		168,349
Customer deposits and other unearned income	86,820		67,775
Other accrued liabilities	129,630		124,547
Total	$ 573,028	$ 545,707	$ 525,199	$ 455,873	$ 461,579